Derailing frog



` c. Bess DERAILING FROG Nov. 4, 1930.

Filed Nov. 29, 1929 INVENTOR, BY C (um. 64

@wzmf ATTORNEYS.

Patented Nov. 4, 1930 UNITED' STATES PATENT OFFICE CHARLES BESS, F DUNSMUIB, CALIFORNIA DERAILING FROG Application led November 29, 1929. Serial No. 410,344.

defect in locomotive, or for any other reason.

By placing these frogs behind and in front ofthe locomotive and tender, derailment will` follow movement in either direction said Vfrogs thus servingas a precaution against accident or serious damage to equipment and property, as would be the case if said movement were not arrested. The lpresent derailing frog is fashioned to overlie and rest upon the rail-head, and is formed with legs to avoid tipping when placed in position; side shoulders to avoid lateral shifting under functional stress; a toelate to prevent slipping under the stress o the entering wheel; a tread surface for raising the entered and advancing wheel to a height at which the bearing is transferred from the wheel tread to thewheel flange; and a derailing member acting against the side of the {iange to sidle the wheel clear of the frog and rail.

In the accom anying drawings, the preferred form o the device is illustrated, though it is to be understood thatv changes may be made without departing from the s irit of the invention as defined by the c aims hereunto appended.v

In these drawings Fig. is a top plan view of the derailing tuig. ig. 2 is a side view of the same.

vF ig. 3 is a cross section on the line 3 3 of Fig. 1.

Fig. 4 is a cross section on the lineY4--4 of F 1g. 1.

1 is a rail of the ordinary T-type, 2 is a cross tie, and 3 is a spike securing the rail to the tie. 4 indicates a wheel of the vehicle upon which the derailment is to be effected.

The body of the frog 5 is, in practice, made of cast steel. To its entering end is welded and projects a fiat iron toe-plate 6, which lies upon the head of the rail 1 and has a beveled front edge 7. The under surface of the body 5 rests upon the head of the rail 1, and is retained thereupon by opposite depending A the rail.

shoulders 8 and 9. From the inside of the body 5, a pair of legs 10 extend downwardly with a length suflicient to rest upon the rail base.

The upper surface of the body 5 from its 55 lforward end 11 where it merges into the level of the flat toe-plate 6, gradually rises to a maximum height at 12, about Vmidway of its length, and thendrops a ain to allower level 13, as shown in Fig. 2. n the leg side or in- 60 side of the frog is formed the derailing member 14 which is an upstanding flange sprin ing outwardly from its union with the boy of .the frog, and separated from said body by a groove 15 deep enough at its beginning to 65 receive the flange of the entering wheel 4, as shown in Fig. 3, said groove thence riding to and merging into the level of the up er or tread surface of the body at its low point 13. The derailing flange 14 gradually converges 70 to and partially crosses the end of the body,

as shown in Figs. 2 and 3.

The purpose of the ilat toe-plate 6 is to prevent the frog from slipping as the wheel enters and encounters the rise. The legs 10 rest 75 upon top ofthe rail-base and prevent the frog from tippin oli' the rail. They also prevent it from shi ting along the rail as the wheel ascends its point; and by placing their feet against a spike 3 driven into the tie, as shown 30 in Figs. l and 2, this effect is further insured. The legs may be designed to suit the height of The retainin shoulders 8 and 9 prevent the frog from slipping sideways, and insure its central positin u on the rail. The widthbetween these'shoul ers may be suited to that of the rail head. As the locomotive or tender starts to move, the tread of its wheel 4 runs upon the beveled end of the toe-plate 6 and holds the frog from slippin as'it en- 90 counters the rise of the body 5. pon this rise the wheel tread rolls and islifted until the wheel fiange is even 4with or above the level of the groove 15. Into said groove the wheel v. flan e 'now enters, and as the groove rises and 95 the ody tread-surface dro s, the wheel is borne upon its ange, until, y reason of the converging derailing flange 14, said wheel is sidled olf theefrog toward the outside and derailment is accomplished.

lait' The body 5, derailing flange 14, and legs 10, are preferably cast integrally. The underside of the body may be formed with cavities 16, if desired, to'save metal and prevent unnecessary weight.

1. A dera-iling frog fashioned to rest upon the head of a rail, said frog having at its forward end a projecting fiat toe-plate to receive the entering wheel and prevent the frog from slipping, said frog havin a rising tread surface to lift the Wheel ro ling thereon and a groove to receive the wheel flange, said tread surface and said groove merging into substantially the same horizontal plane, and a derailing fiange converging to and crossing the tread surface to sidle the wheel therefrom.

2. A derailing frog fashioned to rest upon the head of a rail-and having legs to rest upon the rail base to prevent tipping, said frog having at its forward end a projecting fiat toeplate to receive the entering wheel and preent the frog from slipfping, and said frog having a rising tread sur ace to lift the wheel and a groove to receive the wheel ange, said tread surface and said groove merging into substantially the same horizontal plane, and a derailing flange converging to and cross the tread surface to sidle the Wheel therefrom.

In testimony whereof I have signed my name to this specification.

CHARLES BESS. 

